Backport PR #21307: Use in-tree builds for PyPy wheels

dstansby · meeseeksmachine · commit 5db797d5e0c7 · 2021-10-07T14:10:24.000Z
diff --git a/.github/workflows/cibuildwheel.yml b/.github/workflows/cibuildwheel.yml
@@ -102,6 +102,7 @@ jobs:
           CIBW_BUILD: "pp37-*"
           CIBW_BEFORE_BUILD: pip install certifi numpy==${{ env.min-numpy-version }}
           CIBW_ARCHS: ${{ matrix.cibw_archs }}
+          PIP_USE_FEATURE: in-tree-build
         if: matrix.cibw_archs != 'aarch64'
 
       - name: Validate that LICENSE files are included in wheels
